Tonight sees the launch of the much anticipated fourth season of The Flash, with The Thinker as the new big bad. But what do we know about him and the rest of the season to come? [Warning – some spoilers ahead] In the Season 3 finale we saw Flash defeat Savitar, but it came at a cost. As a result of Savitar being ripped from the Speed Force, Barry Allen’s Flash had to go into the Speed Force in order to balance the books. This meant that he had to leave his beloved Iris in the care of his friends....read more